The outer layer of the cell mass during the embryonic stage, which gives rise to the nervous system, sensory receptors, and outer skin layers, is called the
A) endoderm.
B) mesoderm.
C) ectoderm.
D) trophoblast.
Correct Answer:
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Q20: The zygote embeds itself into the inner
Q21: The optimal time for implantation is _
Q22: A zygote is referred to as an
Q23: Which stage of prenatal development occurs during
Q24: Dana is seven weeks pregnant. In which
Q26: The circulatory system and the skeleton are
Q27: The endodermic layer eventually becomes the
A) respiratory
Q28: The formation of the placenta occurs during
Q29: A naturally occurring termination of a pregnancy
Q30: A general estimate is that _ of
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